Belt-guard for pulleys.



W. L. BLISS.

BELT-GUARD FOR PULLEYS.

APPLICATION FILED SEPT. Is. 1914.

1,296,259. Pa tented Mar. 4, 1919.

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BELT GUARD FOR PULLEYS.

APPLICATION FILED SEPT 18. mm.

1 ,296,259. Patented Mar. 4, 1919.

2 SHEETSSHEET 2.

WILLIAM L. BLISS, 0F NIAGARA FALLS, NEW YORK, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO U. S. LIGHT & HEAT CORPORATION, OF NIAGARA FALLS, NEW YORK, A

CORPORATION OF NEW YORK.

BELT-GUARD FOR PULLEYS.

Specification of Letters Patent.

Patented Mar. 4, 1919.

Application filed September 18, 1914. Serial No. 862,320.

clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

Myinvention relates to belt guards for pulleys.

Electric car lighting equipments for railway cars are generally of the type in which a generator, mounted on the car truck, is driven by means of a belt passing over a pulley on the armature shaft of the generator and a driving pulley on the car axle. Heretofore the driving belts of axle driven generators have been retained on their pulleys by flanges formed integral with the pulleys. There is a tendency under certain conditions of service, for the belt to climb and ride over the flanges.

An object of the present invention is to provide means for retaining the driving belt of an axle driven generator on its pulleys.

Other objects of my invention Wlll hereinafter appear.

An embodiment of the invention is illustrated in the accompanying drawings. In the drawihgs- Figure 1 is a plan of a car truck and an axle driven generator thereon.

Fig. 2 is a longitudinal section on the line AB of Fig.

Fig. 3 is av front view of the pulley end of the generator.

Fig. 4 is an end view of the same- Fig. 5 is an end view of the axle pulley.

Fig. 6 is a top view of the same.

Figs. 1 and 2 illustrate a car truck 10, carried by car axles 11, mounted on wheels 12. A car lighting generator 13 is carried by a suspension 14 mounted on the truck.

The suspension includes a pair of substantially parallel suspension bars 15 projecting beyond one end of the truck, supporting a pair of U-shaped slings 16, upon which the generator is mounted. The generator is secured to the slings by foot-caps 17, and is driven from the car axle by a belt 18, running from the pulley 19 on the car axle to the pulley 20 on the armature shaft. Both the axle pulley and the armature'pulley are of the'flahgeless type.

Figs. 5 and 6 illustrate in detail the guard for holding the belt on the axle pulley. The guard includes'two flat semi-circular members 21, arranged one on each side of the pulley and parallel with the pulley heads.

- These members extend beyond the tread of the pulley to form stationary flanges, so that any tendency of the belt to run ofl the tread of the pulley is immediately checked thereby. The. flanges are formed integral with a connecting brace 22, and are secured by bolts .23 to the upwardly bent portion 24: on a rod 25, which extends from one of the wheel guards 26 to the other. Each of the flanges 21 has a substantially semicircular portion 27 cut away, so as to avoid interference with the vertical movement of the axle. They are spaced far enough from each side of the pulley to permit the necessary end play of the axle.

Figs. 3 and 4 illustrate the guard for the armature pulley 20. The guard includes disk-shaped plates 28, 29, arranged one on each side of the pulley and parallel with the pulley heads. The plates are made of greater diameter than the pulley, so that their peripheries extend beyond the tread thereof to provide flanges which serve to check any tendency of the driving belt to run off the pulley. The plate 28 has a central circular opening 30 to permit it to be passed over the armature shaft. It is secured to'the side of the generator casing by suitablestuds 31. If desired, the generator casing maybe formed with a flat circular end adapted-to take the place of the plate 28. The plate 29 is secured to the upwardly extendin arm 32 of an L-shaped bracket 83, secure to the foot-caps of the generator.

This improved construction provides a guard which will effectively hold the driving belt on the tread of its pulleys under all service conditions. Even the presence of snow and ice when encountered in winter service, will not impair the efficiency of the apparatus.

Another advantage of my improved construct-ion is that where the clearance with the truck, brake-beam and center sill is important, the absence of the flanges on the pulley permits of a pulley ofgreater diameter than could be used if the flange type were employed.

The embodiment of my invention described herein has been selected merely for the purpose of illustration. My invention covers all equivalent means for accomplishing the desired results, so long as such means fall Within the scope of the appended claim.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is The combination of a truck including an axle mounted thereon havin a flangeless pulley, a guard for said pulley, and sup portin means for said guard having extremities extending away from said guard in opposite directions for attachment to adjacent parts of the truck frame.

In wltness whereof, I have hereunto subscribed my name in the presence of two witnesses.

WILLIAM L. BLISS.

Witnesses:

L. S. CoNNnY, F. H. ZELLHOEEER. 

